All ingredients in all of the toppers are nutritious whole food ingredients, so giving more than the recommended dose is very unlikely to cause any harm. All ingredients have a wide margin of safety. However, the toppers do contain soluble and insoluble fibre (especially the Digestion Support Wholefood Powder), and feeding a very large amount of fibre may cause mild, transient gastrointestinal signs like soft stools, flatulence or bloating.
Therefore, following the recommended dosing per day is advisable.
Toppers and treats do also contain calories, so it is important to account for this and to monitor your dog’s body weight and body condition, otherwise excess weight gain may occur.